public class demo11 {
    public synchronized static void add(){
        count++;
    };

    public static long get(){
        return count;
    };

    public static long count = 0;
    public static void main(String[] args) throws InterruptedException {

        Thread t1 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                demo11.add();
            }
        });

        Thread t2 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                demo11.add();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println(demo11.get());
    }
}
